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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10626476 B1

PDFFull Text
Date of Patent:
Apr. 21, 2020

Filed:

Dec. 26, 2013

High specific strength steel sheet and method for manufacturing same

Applicants:

Posco, Pohang-si, Gyeongsangbuk-do, KR;

Postech Academy-industry Foundation, Pohang-si, Kyungsangbook-do, KR;

Inventors:

Han-Soo Kim, Pohang-si, KR;

Nack-Joon Kim, Pohang-si, KR;

Yoon-Uk Heo, Pohang-si, KR;

Sang-Heon Kim, Busan, KR;

Jae-Sang Lee, Pohang-si, KR;

Jin-Mo Koo, Pohang-si, KR;

Assignees:

POSCO, Pohang-si, Gyeongsangbuk-do, KR;

Postech Academy-Industry Foundation, Pohang-si, Kyungsangbook-do, KR;

Attorney:

Morgan, Lewis & Bockius LLP

Primary Examiner:

Colin W Slifka

Int. Cl.
CPC ...
C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/58 (2006.01); C22C 38/60 (2006.01); C21D 6/00 (2006.01);
U.S. Cl.
CPC ...
C21D 9/46 (2013.01); C21D 6/005 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C21D 8/0247 (2013.01); C21D 8/0263 (2013.01); C22C 38/00 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C22C 38/58 (2013.01); C22C 38/60 (2013.01); C21D 8/02 (2013.01); C21D 2211/001 (2013.01); C21D 2211/004 (2013.01);
Abstract

A high specific strength steel sheet and a method for manufacturing same are disclosed. The high specific strength steel sheet, which is an aspect of the present invention, is characterized in that an Fe—Al-based intermetallic compound having an average particle diameter of 20 μm or less is homogeneously dispersed in an austenite matrix, the volume fraction of the Fe—Al-based intermetallic compound is 1 to 50%, and the volume fraction of κ-carbide ((Fe,Mn)AlC) which is a perovskite carbide and has an L12 structure is 15% or less.

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